Waterproofing of masonry walls



Dec. 10, 1935. A. L. LARSON WATERPROOFING OF MASONRY WALLS Filed Aug.14, 1934 INVENTOR l 44 l Arued L.Lar'50n I Y (2,- 45 ail-g ATTORNEYPatented Dec. 10, 1935 UNITED STATES PATENT OFFICE 6 Claims.

The present invention relates to waterproofing of masonry walls.

In building construction the regular arrangement of header and stretchercourses of brick must be interrupted whenever a door frame, windowframe, column or other structural element is inserted in the wall. Suchelements interfere with the laying of the header courses. The stretchercourses generally continue past the column or in front of a part of thewindow frame or door frame.

The present invention is directed more particularly toward thewaterproofing of walls in the neighborhood where the brick or masonry isinterrupted by such obstructions.

Notwithstanding the well known fact that these places in a brick andmasonry wall were more susceptible to leakage than the remainder of thewall, it has, in practice, been the universal custom to neglect properwaterproofing at these points. The mortar, itself, has been relied uponwithout any waterproofing. Caulking or mastic have been used as the onlyprecautionary measure. Such expedients however, have been of little orno value. The window frames,. and door frames particularly have beensources of leakage not only of water, but of drafts, which admitted airto such an extent as to cause smut streaks on the inside wall finish.

According to the present invention, waterproofing is installed betweenthe bricks or masonry and door frame, window frame, column or otherobstruction in such a way as to completely waterproof the walls so thatwatercannotpass 5 through the joint between the briel n frame or column.w

The accompanying drawing shows for purposes Fig. 1 is a perspective viewshowing the waterproofing of a window frame or the like ina 45 brickwall;

Fig. 2 is a plan view showing a blank from which the sheet ofwaterproofing is made;

Fig. 3 is a perspective view illustrating the blank partly folded toshape; and 50 Fig. 4 is a view looking in the direction of the arrow 4of Figure 1 showing the blank only.

In the drawing outer header brick is indicated at I0, outer stretcherbrick at H, inner header brick at l2, inner stretcher brick at l3 andthe 55 inside stretcher brick at I4. The element IS indicates a windowframe, door frame, a column or, other vertical member.

While the drawing shows the wall laid in American running bond, it isunderstood that any other form of bonding may be employed so long 5 asthe wall has overlapping header and stretcher courses.

The waterproofing units used in the running part of the wall areindicated at 20. They have horizontal portions 20a between the lappedporlo tions of the header brick I0 and I2 and vertical portions 201) and200 in the vertical mortar joints as set forth in co-pendingapplications.

The waterproofing element 30 employed .for waterproofing the portion ofthe brick wall adja- 15 cent to the vertical element I5 is made up asshown in Figures 2, 3 and 4. The flat blank B of suitable waterproofingmaterial such as asphalt or tar coated rolled running felt of suitablesize is creased longitudinally as indicated at 3| 20 and 32 and has anedge cut away as indicated at 33. It is also provided with slits 34, and35 and creases indicated at 36, 31 and 38. The material between thecreases 36 and 31 is folded to be at right angles to the rear verticalpanel 25 4| and to be above the horizontal panel 42. The material onopposite sides of the crease 38 forms a folded portion 43 as indicated.The tab 44 formed by the material to the left of the slit 34 is thenbrought down over the upper left corner 30 of the front depending face45 of the waterproofing element. The folded portion 43 is secured to theportion 40 by adhesive and the tab 44 is secured to the front wall 45.

The element 30 is placed in the wall as indi- 35 eated in Figure 1. Theparts 44 and 45 occupy the vertical mortar joint behind the frontcourses of stretcher brick and in front of the edge of the frame orcolumn. The portion 40 occupies the spaces between the verticalobstruction I5 40 and the like where heretofore there has been nosatisfactory way of affording complete waterproof protection. Thewaterproofing may be placed 66 in the wall before the window frame isinserted if occasion demands.

It will also be obvious that a masonry backing of tile or the like maybe used instead of the brick backing illustrated.

What is claimed is:

1. A brick wall having header and stretcher courses in each face thereofwith the header courses lapped transversely, there being horizontalmortar joints between the courses of brick and vertical mortar jointsbetween opposite stretcher courses and between opposite header andstretcher courses, a vertically extending obstruction intercepting thecourse of header bricks from the outer face of the wall, andwaterproofing elements extending across the portion of the horizontaljoint between lapped header bricks, up-

wardly through one vertical mortar joint and downwardly through theother vertical mortar joint, the waterproofing element extending to anadjacent course of header brick, said waterproofing element having avertical portion extending transversely of the wall between theobstruction and the adjacent header brick, and a portion which extendspast the edge of the obstruction and over a part of the front facethereof.

2. Waterproofing means for brick walls comprising an impervious elementof generally 2 shaped vertical cross section having a long leg of aheight equal to the height of a plurality of courses of brick in a brickwall, a horizontal portion equal to one half the length of a brick, anda short vertical portion whose height is greater than the thickness of abrick course and adjacent mortar joints, one of said vertical portionsbeing narrower horizontally than the other and connected to it by atransverse element sealed at its lower end to the horizontal portion.

3. The combination with a vertical window frame, door frame or the like,of a brick wall having on its inner face stretcher and header coursesbuilt up alongside said vertical member and on its outer face header andstretcher courses, the outer header course over-lapping the inner headercourses and terminating along the side .and underneath the outer headerbrick and in the vertical mortar joints behind the stretcher courses.

4. A waterproofing element having an upwardly extending vertical rearwall, a horizontal wall, a vertical wall extending forwardly from 5 therear wall above the horizontal wall and secured thereto, 9, dependingfront wall extending beyond the forwardly extending wall and an ex--tension from the forwardly extending wall in the plane of the frontwall, the extension being secured thereto.

5. The combination with a vertical window frame, door frame or the like,of a solid masonry wall having inner and outer faces and comprisingheader and stretcher courses of brick in the outer face and a masonrybacking extending to the rear face, the said header course overlappingthe masonry backing and terminating along the side face of the verticalmember and the front stretcher courses extending past the edge of saidmember, and waterproofing material occupying the joints between thefront brick course and the vertical member and the transverse jointbetween the vertical member and the front header brick and extendinglongitudinaly of the wall behind and underneath the outer header brickand in the vertical mortar joints behind the stretcher courses.

6. A solid masonry wall having inner and outer faces and comprisingheader and stretcher courses of brick in the outer face and a masonrybacking extending to the rear face, there being vetical mortar jointsbehind the stretcher courses. horizontal mortar joints underneath theinner ends of header bricks and vertical mortar joints behind the innerends of the header bricks, said latter vertical mortar joints extendingupwardly above the header brick, a vertically extending obstructionbehind the stretcher courses and intercepting the course of headerbricks, and a plurality of imperforate water proofing elements eachextending upwardly through the first men tioned vertical mortar joint,rearwardly in the adjacent horizontal mortar joint and then upwardlythrough the second mentioned vertical 4'5 mortar joint and terminatingabove the lower edge of the next water-proofing element above, thewaterproofing element adjacent the obstruction fitting the front face ofthe obstruction, and the side face thereof above the said horizontalmortar joint.

ARVED L. LARSON.

